Gwyneth Paltrow appears on the cover of Harper's Bazaar. Inside, she talks about infidelity.Terry Richardson/Harper's Bazaar

Gwyneth Paltrow once tolerated a boyfriend who cheated on her frequently, even though she “knew on a cellular level.”

Paltrow tells the March issue of Harper’s Bazaar about the philandering ex and, while she doesn’t identify him, it’s possible that she’s describing one of her famous former flames — Brad Pitt, who she was engaged to in the mid ’90s, or Ben Affleck, who she dated for three years after.

“I had a boyfriend who used to cheat on me all the time,” Paltrow tells the magazine. “I was quite naive. I knew on a cellular level, but I bought his story.”

However, the bad experience did not lead her to automatically condemn anyone who strays.

“The older I get, the more open-minded I get, the less judgmental I get. Life is long,” she says. “I have friends who I love and admire who have had an affair. When I was younger, I would have said he’s a terrible person or she’s a terrible person. But who made these laws?”

Paltrow also tells the magazine about her relationship with husband Chris Martin. While the two have been married for years, the actress and Goop creator admits that it isn’t always perfect.

“I think you do fall in and out of love and you just keep going, and every time you go through a really difficult phase, you rediscover something new and it just gets better. We’ve been married for more than eight years now, and we’re still into it,” said Paltrow. “My parents were married for 30-something years, and [my dad] said [it was] because they never wanted to get divorced at the same time.”

Paltrow was photographed by Terry Richardson for Harper’s Bazaar, which has been newly redesigned. The sleek photos show Paltrow in a black dress with cut-outs revealing her toned torso and a high slit emphasizing her long legs.